Night Light of Songling (Hebei) from space (China) Src. Average luminocity for 10x10km area is 1.1803% and for 50x50km: 2.5172%.
Square area 10x10 km:
 0%
 0% 0%
 0% 0.68%
 0.68% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0.68%
 0.68% 0.68%
 0.68% 0%
 0% 97.96%
 97.96%Square area 50x50 km:
 0.02%
 0.02% 0.09%
 0.09% 0.34%
 0.34% 0.25%
 0.25% 0.37%
 0.37% 0.47%
 0.47% 0.61%
 0.61% 1.03%
 1.03% 0.48%
 0.48% 1.6%
 1.6% 94.75%
 94.75%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 49' 38" North, 117° 33' 57.5" East
40° 17' 34.9" North, 118° 16' 8.7" East
39° 45' 16.6" North, 118° 58' 20" East
Some cities around Songling sort by population:
• Tangshan
		73.7 km =45.8 mi,  185°
185°
• Chengde
		77.8 km =48.3 mi,  340°
340°
• Linxi
		66.4 km =41.3 mi,  166°
166°
• Zhaogezhuang
		59.9 km =37.2 mi,  168°
168°
• Tangjiazhuang
		63.1 km =39.2 mi,  165°
165°
• Fengrun
		52.7 km =32.7 mi,  194°
194°
• Guye
		64.2 km =39.9 mi,  166°
166°
• Bangjun
		91.9 km =57.1 mi,  248°
248°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016